REFERENCE
405
Power Amplifier
OWNERS MANUAL
AND
INSTALLATION GUIDE
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between the circuit board and the
to ensure cool, efficient amplifier operation.
in a design called
CONGRATULATIONS
You now own the REFERENCE405 Amplifier, the product of an
uncompromising design and engineering philosophy. Your Soundstream
REFERENCE amplifier will outperform any other amplifier in the world.
Staggered Asymmetrical Electronic Crossover Continuously variable
crossover with 24 low pass and 12 high pass.
To maximize the performance of your system, we recommend that you
thoroughly acquaint yourself with its capabilities and features. Please retain
this manual and your sales and installation receipts for future reference.
Power Supply Design All power supply components are
located near one another, connected by thick, wide PCB traces, which
ensures rapid high current delivery. The entire power supply section is
isolated on one side of the circuit board while the audio stage is located on
the other, guaranteeing minimal noise.
Soundstream amplifiers are the result of American craftsmanship and the
highest quality control standards, and when properly installed, should provide
you with many years of listening pleasure. Should your amplifier ever need
service or replacement due to theft, please record the following information,
which will help protect your investment.
Ultra-Low ESR Capacitance Bank Multiple small input power capacitors
are used to provide a lower ESR (Equivalent Series Resistance), which
means the capacitors are able to provide more current, faster.
Model and Serial
Dealer’s Name
Smart Thermal Rollback Power Supply Most amplifiers shut off when
they get too hot. In the unlikely event the REFERENCE405 reaches
it will roll back average power output capability (without affecting the
dynamics) until the amp cools off, when full capability is restored. If
overheating should continue, a second thermal sensing protection circuit
Date of Purchase
Installation Shop
Installation Date
will shut off the amplifier if the
reaches
Unregulated Power Supply 4 ohm power ratings are measured at 12
volts, which means substantially greater output in the real world when the
vehicle is running, where voltages range from 13.2 to 14.4 volts. Dynamic
capability of the loosely regulated power supply is much greater than that
of a tightly regulated power supply.
CAUTION!
Prolonged listening at high levels may result in hearing loss.
new Soundstream REFERENCE amplifier sounds better than anything you’ve
ever heard, exercise caution to prevent hearing damage.
Even though your
Fault Monitor LED on the front panel notifies you of blown power supply
fuses.
DESIGN FEATURES
112 Ohm Drive Ability The REFERENCE405 subwoofer channel is
Uncompromising Design and Construction including mil-spec glass
epoxy circuit boards and high current custom gold-plated solid brass
connections that will accept up to 4 gauge power/ground wire.
designed to drive nearly any load--all the way down to a
Ohm load!
Five Dual Discrete Class A Drive Stages Over six times the drive
current of most amps, which maintains performance into low impedance
loads.
High Power/High Current Capability (Subwoofer channel)
Soundstream’s exclusive circuit which permits customization of your
amplifier to its particular application--high current, low impedance loads
(multiple subwoofer, 1 ohm or less) or high power, higher impedance loads
(greater than ohm).
Muted Turn-on/off Circuit A unique circuit which
Drive Delay
completely eliminates any amplifier-related turn-on/off noises.
Flexible Input Sensitivity accepts input voltages from 100
which permits maximum output from amplifier with virtually any source unit.
to 2.5 V,
Darlington Power Array Soundstream’s “over-building” of
the output section incorporates several output transistors instead of a few
to deliver more power, faster. The transistors are directly sandwiched
Balanced Input Design for added immunity to noise caused by component
and vehicle electrical system interaction.
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SYSTEM
2
Channels of input: 4
Channels: none
Channels of input: 2
Bridged Channels: none
Channel Impedance: 2 ohms
Channel Impedance: 4 ohms
Current Setting: High Power
High
Current
High
High
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REFERENCE 405
Connections
REFERENCE 405
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24
HGH
HGH
CH
HGH
FUSES
FUSES
24
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SYSTEM
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4
Channels of input:
Channels of input: 2
Channels: 1
Channels: none
Subwofer Channel Impedance: 2 ohms
High
4
Subwofer Channel Impedance: 1 ohm
High Current Setting: High Current
Current Setting: High
outboard “dual amp
to remotely
adjust
level.
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Front
REFERENCE 405
REFERENCE 405
TO+
WELLES
12
+
24
24
HEAD
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Settings
FUSES
4
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5
The mono channel can be set to operate either full range or low pass. To
use the low pass crossover, select low pass; to operate the channel up to
400 Hz (for use with an external crossover), select bypass.
INSTALLATION
1. PLAN THE INSTALLATION
Before you go any further with the installation of the amplifier, map out the system
and the necessary wiring. Your work will be simplified if you have a plan of
attack. Consider all electrical requirements, as well as physical, such as amplifier
ventilation and availability of space.
C. High Power/High Current (mono channel)
The mono channel can be set to operate in either high power or high current
mode. Select the mode of operation as follows:
High Power
1 Ohm or higher
High Current
2. SELECT OPERATING MODES (on underside)
The configuration switches are accessible by removing the plugs on the
underside of the amplifier. They allow you to determine the operating
configuration of the amplifier, including:
less than 1 Ohm
The REFERENCE405 subwoofer channel is designed to drive extremely low
impedances. Be sure that the High Power/High Current switch is in the
appropriate setting for best performance and maximum reliability.
5 or 3 channels of input (via bridging)
normal (High Power) or low impedance (High Current) operation with the
subwoofer channel
number of channels of input to drive the amplifier
D. Inputs (see System Diagrams
All five channels of the REFERENCE405 can be driven with
input. If your head unit has one or two pairs of outputs, you can drive all 5
channels of the amplifier.
4)
or 6 channels of
crossover activation for the subwoofer, front, and rear channels
A. Stereo/Bridged Mono (see System Diagrams
4)
Each pair of the 4 channels rated at 25 watts each (12 volts) can be bridged
mono. If running either pair of channels in mono, be sure to set the switch for the
appropriate pair to “mono.”
Channels of Input
Switch setting for each set of channels
# of channels of
Subwoofer
CONNECTION DIAGRAMS
1, 2, 3 or
1, 2, 3 or
SUB CH
4
4
2
4
1
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6
NOTE: Channels
2 are not listed. These channels must a/ways receive input
BRIDGED MONO
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in order for operation of all 5 channels.
STEREO
R
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3. LOCATION OF THE AMPLIFIER
When mounting the amplifier, it should be securely mounted to either a panel in
the vehicle or an amp board or rack that is securely mounted to the vehicle. The
mounting location should be either in the passenger compartment or in the trunk
of the vehicle, away from moisture, stray or moving objects, and major electrical
components (electric motors, fuel pumps, etc.). To provide adequate ventilation,
mount the amplifier so there are at least 2 inches of freely circulating air above
and to the sides of it.
B
Crossover Settings
Each pair of the 4 channels rated at 25 watts each (12 volts) can be set to
operate either full range or high pass. To use the built-in high pass
crossover, select high pass. If you are using the mono channel full range or
with an external crossover, select bypass.
4. MOUNTING OF THE AMPLIFIER
1. Using the amplifier as a template, mark the mounting surface.
2. Remove the amplifier and drill the holes.
3. Mount the amplifier to the surface using the provided hardware.
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amplifier power LED is on and the source unit is playing, you should have
sound coming from the speakers.
5. WIRING
The only tool needed to make wire terminations at the amplifier will be a flat
blade-type screwdriver and either wire strippers or a knife. When baring wires for
connection to the amplifier, remove approximately
into the terminal block, and tighten the screw. Determine from the chart below
the minimum gauge power and ground wire for your application.
of the insulation, insert
6. LEVEL SETTING
The input levels are adjusted by means of the input level controls located
between the RCA inputs and the speaker outputs. When the amplifier is
operated in the mono/bridged mode, only the right channel input is active.
up to 5’
Soundstream Power40
or Power80
up to 10’
Soundstream
Power40 or Power80
(4 or 8 ga.)
greater than
Soundstream
Power40
1.
Turn the amp’s input level controls to minimum position (fully counter-
clockwise).
(4 or 8 ga.)
2. Set source unit volume to approximately 314 of full volume.
3. While playing dynamic source material, slowly increase the amplifier’s
input level(s) until a near maximum undistorted level is heard in the
system.
(4
Wiring Tips
Use grommets when running cables through any metal or sharp plastic
to prevent accidental shorting or shearing.
NOTE: The best Signal to Noise ratio is achieved when the amplifier
Be certain that the cables don’t interfere with normal operation of the
vehicle.
input gains are set between 500
and 2.5 V.
Choose the location of the audio cables carefully to prevent interference
with the vehicle’s high current circuits and vehicle management systems
(engine computers, relays, etc.).
7. CROSSOVER ADJUSTMENTS
The REFERENCE405 incorporates a continuously variable staggered
asymmetrical electronic crossover. The high and low pass portions of the
crossover can be adjusted independent of one another. Follow the below
procedure to adjust the crossover:
1.
Carefully run the audio and remote turn-on cables to the amplifier.
2. Connect the speakers as shown in “Selecting Operating Modes” in section
2. Use at least a 16 gauge speaker wire, preferably a flexible multi-strand
cable, such as Soundstream Speaker 160 or Speaker 120.
Make certain the crossover is activated (see Section
Operating Modes).
2. Set crossover frequency adjustments to the 12 o’clock position.
3. While listening to music, adjust the high pass frequency dial for the high
pass. Select a frequency high enough to prevent damage to the
Select
3. Carefully run the positive power cable from the battery to a fuse or a
circuit breaker and then to the amplifier. Connect the lead to the battery
via either a fuse or circuit breaker within 18 inches of the battery. The fuse
or circuit breaker value should be 40 to 50 amps. Leave the fuse out or the
speakers, yet low enough that you are able to retain
speakers.
in the front
4. Adjust the subwoofer frequency control in the same way as the high
pass. This time, listen to bass. You should find a setting that will give
you a solid sound with minimum “boom” from resonating frequencies.
Note; Many times, the best results are achieved with the high pass
frequencies set higher than the low pass. This “staggered” setting
circuit breaker off until the installation is
finished. If the circuit
breaker cannot be shut off manually, do not make the final power connection
until the installation is finished.
4. Run a ground cable for the amplifier and securely connect it to a solid
chassis ground on the vehicle. The ground cable should be the same gauge
as the power cable.
compensates for much of the
resonance inherent in the automobile
environment.
You may
it necessary to readjust the crossover listening to the
system. The correct settings are a combination of the capabilities of the
equipment and your listening preferences.
Double check each and every connection.
6. Reconnect the fuse or circuit breaker. Power up the system and look at
the green and red
depending on the configuration, one should be lit.
The may be a 2 3 second delay from the time that the source unit is turned
on to the time that the LED on the amp turns on, which is normal. Once the
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10
8. PROTECTION CIRCUITS
10. SERVICE
Your REFERENCE405 amplifier is protected against both overheating and short
circuits by means of the following circuits:
Your Soundstream amplifier is protected by a limited warranty. Please read the
enclosed warranty card.
Main power supply fuses (2 at 20 amps each)
Smart Power Supply Thermal Rollback activating at
A fail-safe thermal protection circuit activating at
Speaker over-current protection relays (on the 4 x 25 watt channels).
Your amplifier also incorporates an innovative Fault Diagnosis system that
identifies a blown power supply fuse.
11. SPECIFICATIONS
POWER OUTPUT
25 watts x 4 plus 100 watts x 1 (4 ohms, 12
Current)
50 watts x 1 (4 ohms, 12 V, High
40 watts x 4 plus 120 watts x 1 (4 ohms, 14.4
200 watts x 1 (2 ohms)
If you experience blown main power fuses, DO NOT increase values beyond
20 amp (each) fuses.
watts x 1 (1 or
ohm)
THD:
Signal to Noise:
9. TROUBLESHOOTING
Frequency Response: 20 Hz to 20
(dedicated sub channel): 20 Hz to 400 Hz
Bandwidth: 15 Hz to 50
0.5
0.5
PROBLEM
No sound and
CAUSE
no power or ground at
are not lit
(dedicated sub channel): 15 Hz to 1
Stereo Separation:
Damping:
no remote turn-on signal
blown fuse near battery
amp power supply fuse is
blown
Fault LED is lit
Input Sensitivity: 100
2.5 V
Input Impedance: 12 k ohms
Repeatedly blown amp fuse,
frequent activation of Smart
Power Supply Circuit or
speaker protection circuit
breakers
check speaker
configuration, amp may be
in “High Power” mode, put
amp into “High Current”
mode if speaker load is
less than 2 Ohms (see
Section 2, Selecting
Operating Modes)
speaker or leads may be
shorted
Crossover Specifications:
High Pass: 12
Continuously Variable
from 60 240 Hz (front rear)
Low Pass: 24
from 30 120 Hz
Continuously Variable
Dimensions: 16” W x
D x
H
verify adequate amplifier
ventilation
no sound from subwoofer
channel with 2 or 4 channels of
input
check input settings on
bottom of amplifier--switch
should be set at inputs
2, 3 or 4” unless using
external inputs
l
no sound from channels
check input settings on
bottom of amplifier--switch
should be set at inputs “1
2”
3
4 with 2 channels of input
12
11
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SPEAKER WIRING CONFIGURATIONS
Four 4 Ohm Speakers
In
=
Ohm
SOUNDSTREAM TECHNOLOGIES
120 Blue Ravine Road
l
Folsom California 95630 USA
tel 916.351
fax 916.351.0414
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